Terrax split the planet Galador in two with a swing of his axe,
While wearing the belt of strength, the shockwaves from Thor hitting a Celestial shattered cities and mountaintops across an entire planet...compared toSuperman shattering windows in Metropolis when fighting Doomsday, its orders of magnitude above, even if he was at 2X, its a feat that is thousands of times more impressive....

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Most of the showings mentioned though are post Silver Age...Marvel still has those silver age feats in continuity, so you're dealing with absorption of the bomb that would have destroyed 1/4 of the Universe etc.